Sifting mechanism



Jan. 2, 1923. 1,440,539.

. .HALVORSEN.

MECHANISM.

- L ULY 17. 1922. 2 SHEETS-SHEET 1.

Jan. 2, 1928. 1,440,539. A. I. s. HALVORSEN.

SIFTER MECHANISM. FILED JULY 11, 1322. v 2 SHEETSSHEET 2.

INVENTOR i /I Ha Iva/ 32."

ATTORNEY the sifter is not in use.

It atented Jinn, ,2, lgilliiii inane SIFTING MECHANISM.

Application filed. July 17, 1922. Serial No.- 575,702.

T 0 all whom it may cancer/1 Be it known that 1, Ann. I. S. Hanvonsnn, a citizen of the United States, residing at Albany, in the county of Delaware and State of Indiana, have invented certain new and useful Improvements in Sifter Mechanisms, of which the following is a specification.

Idyinvention relates to sifters for flour bins and the like and it has for its object to simplify and improve the construction thereof. i

Bins such as are incorporated in kitchen cabinets and the like for holding flour are commonly constructed with a si'rter outlet at their lower ends within which is arranged a rotatably supported sieve that "is manually oscillated to cause the flour to discharge by gravity through the same. This sieve is mounted within a sifter body detachably connected with the bin and means, including a manually operated handle, upon the outside of said body. is provided by means of which the sieve is operated to cause sifted flour to be discharged from said outlet. The principal object of my invention is to improve the construction of the sieve mecha nism of bins of this kind and the invention consists of a sifter mechanism having the peculiar features of construction and mode of operation hereinafter pointed out.

In the accompanying drawings:

Figure 1 is a frontelevation of a flour bin including a sifter mechanism constructed in accordance with my invention.

Figure 2 is a plan view of the sift-er mechanism.

Figure is aside elevation partly in section, of the sifter mechanism shown in Fig. 2.

Having reference to the drawings a is the body of my improved sifter mechanism and the sieve. The body a is made from sheet metal and at its lower end is formed with a spout a adapted to receive upon .it a cap or cover (not shown) by which it is closed when The sieve 7) is saucenshaped. or concaved circular piece of --w1re screen having its edge or margin soldered to a chine wire Z) by which said marginal portion is strengthened and reinforced. The sieve 7) is disposed within a bail-shaped yoke 6 (broken away in Fig. 2) made from a narrow metal strip, the bottom portion of said sieve resting upon the middleportion of said yoke, and the ends of the latter being i v vided with ahandle 70% serves as means by soldered to vthe chine wire Z)" and screen 6.

an integral downwardly At its middle the yoke has rigidly fastened to it a depending spindle or stud b which, shown in Fig. 2, is square in cross-section. This square stud occupies asquare hole provvidcd at the middle ofthe hub of a gear f thatis supported by a shelf 0 The shelf isa flap or tang provided upon a girder 0 which extends diametrically across the interior of body a and has its ends 0 fastened by rivets c to the latter. At its middle'the girder 0 is provided upon its under side with a countersink or socket c that is occupied by the hub of gear f so that the latter is heldagainst lateral displacement and this countersink provides a boss uponthe top side of girder c by which the yoke 5 and partscarried thereby, are rotatably supported without liability of interference between'yoke b 'and girder 0. Circular apertures formed through girder c and flap 0 are occupied by the stud b sothat the yoke 6 and parts carried thereby are held against later-ahdisplacement, said stud bein free to rotate in said apertures.

it one side thereof the girder c is made with two integral tangs' 0* which are bent downwardly and then laterally under the body portion of the girder to provide two shelves for supporting a metal rack (Z provided at one side with gear teeth in mesh with the teeth of pinion f, the space between of the rack to permit free movement of the latter. As willbe clear the rack (Z is held against lateraldisplacement by pinion f and the two ta-ngs 0 At one side thereof the rack dis made with extending yoke tang rd that is formed with a vertical whose lower endis indicated at (Z This slot is occupied by a crank is forming part of a crankshaft kjournaled atits inner end in a bearing provided in a depending tang 0 integral with girder 0,. said inner end portion of shaft 7c being of reduced diameter soto provide a shoulder immediately adjacent one side of tang 0 which prevents 'endwise displacement ofsaid' shaft in one direction. To prevent endwise displacement of shaft k in the opposite direction the reduced end. portion thereof is threaded to re ceive upon it a nut 76 disposed immediately adjacent the other side ofsaid tang.

A crank Is at theouterend of shaftJc proslot through pinion f and stud b to oscillate the sieve Z). Thus a continuous rotary motion of shaft 7c imparts an oscillatory movement to the sieve b.

The bodya is telescopically fitted at its upper end upon theusual outlet spout of the bin and when a-supply of flour or thelike is within the bin, said flour feeds by gravity down on to the sieve Z). It will therefore be clear that by means of handle 76* the rack 65 may be manuallyreciprocated and said rack will then act through pinion and stud Z) to oscillate the sieve causing the flour to pass through the latter; and discharge from nozzle a.

The'construction above described is efficient simple and inexpensive, and as will be clear, the location of the rack (Z and pinion f below the girder 0 prevents clogging of the gear teeth with flour. It will also be observed that the construction described has the advantage that the sifter may be removed for cleaning by simply removing body a from the bin and lifting the sieve out, and that when so. removed the'pinion f is held in its proper normalposition. by the pocket 0 Whatl claim is:

1. A sifter mechanism comprising a hollow sheet metal body for attachment to a bin; a girder withinsaid body extending diametrically across the same and having its ends fastened to said body, said girder being made atits middle and upon its under side with a recess; a'pinion pocketed within said recess; a spindle connected with said pinion and extending upwardly therefrom through said girder; a sieve rotatably and removably supported upon the top side of said girder and connected with said spindle; a rack slid-i ably supported beneath and by said glrder said rack being in engagement with said pinion, anda shaft-extending from the exterior of said body through the wall of the latter made with a crank-directly engaging said rack so that continuous rotary motion of said crankin one direction reciprocates said rack and the latter oscillates the pinion spindle and sieve;

A sifter mechanism comprising a hollow sheet metal body; girder within body extending diametrically across the same and having its ends fastened to body said girder being made at its middle and upon its under side with a recess; a pin ion pocketed within said recess; a spindle connected with said pinion and extending upwardly therefrom through said girder; a sieve rotatably supported upon the topside of said girder and connected with said spinvdle; a rack slidabl-y supported beneath and by said girder, said rack being in engage meut with said pinion, and a shaft extending from the exterior of said body through the wall. of the latter made with a crank directly engaging said rack so that continuous rotary motion of said crank in one direction reciprocates said rack and the latter oscillates the pinion, spindle and sieve;

3. A sifter mechanism comprising a ho].- low sheet metal body; a girder within said body extending diametrically across the same and having 1ts ends fastened to said-body,

said girder being made at its middle and upon its under side with a recess; meanscarried by said girder and extending beneath said pinion to support the latter within said recess; a spindle connected with said pinion extending upwardly therefrom through an aperture in said girder; a sieve rotatably supported upon the top side of said girder and connected with said spindle; a rackimmediately beneath said girder meshing with said pinion and provided with a downwardly extending yoke; means slidably connecting said rack with said girder anda shaft extending from the exterior of said body.

through the wall of the latter made with a crank engaged with said yokeso that continuous motion of said crankin one direction reciprocates said rack to cause the latter to oscillate the pinion, spindle and sieve, said shaft being provided at its outer end with a crank handle.

a. A. sifter mechanism con' prising a hole low sheet metal body a girder within said body extending diametrically across the same and having its ends fastened to said body.

said girder being made at its middle and uponits under side with a recess; means carried by said girder and extending beneath I movement thereof aiul so asto hold the same against sidewise displacement and a shaft extending from the exterior of said body through the wall'of the latter madewith crankengaged with said yoke so that continuous rotary motion of said crank in ,one direction reciprocatcs said rack to cause'the latter to oscillate the pinion spindle and sieve, said shaft being provided atits outer end with a crank handle.

In testimony whereof I'have aflixed my signature;

AXEL I. nanvonsnu; 

